Academy Award-winning director Alex Gibney (Taxi to the Dark Side, Enron: The Smartest Guys in the Room) presents his examination of how the gap between rich and poor Americans has become so stark, as illustrated by this famous boulevard in New York City. One building on Park Avenue, in Manhattan, is home to the highest concentration of billionaires in America. Less than five miles down the same street, in the Bronx, is America's poorest congressional district.